Planetary gear reducer

Abstract

The utility model discloses a planetary gear reducer, which relates to the field of planetary gear reducers. The technical solution thereof is as follows: it comprises a gear box housing, a rotating transmission sleeve is arranged on one side of the gear box housing, a first sun gear is arranged at the center of the transmission sleeve, a rotating transmission disc is arranged in the gear box housing, a plurality of first gears are arranged in an annular array on the transmission disc, a second sun gear is arranged on the side of the transmission disc away from the first gear, an output disc is also arranged on one side of the gear box housing, a plurality of second gears are arranged in an annular array on the output disc, and a first gear ring and a second gear ring are arranged on the inner wall of the gear box housing, respectively meshing with a plurality of first gears and a plurality of second gears. The utility model arranges the first gear ring and the second gear ring in the gear box housing, so that the first gear ring meshes with three first gears, and the second gear ring meshes with four second gears, so that the internal structure of the entire reducer is compact, the internal transmission backlash is reduced, the gear is prevented from being offset, and the safety performance is increased and reduced.

Description

Technical Field

[0001] The utility model relates to the field of planetary gear reducers, and more specifically, to a planetary gear reducer. Background Art

[0002] Currently, the common wheel-side drive methods in the automotive field are divided into two forms: direct drive and reduction drive.

[0003] Compared with direct drive, reduction drive has the advantages of low cost, large torque, greatly improved vehicle starting and climbing performance, excellent acceleration performance, and strong off-road capability. The matching wheel hub motor is easy to design and manufacture, and has a lower overall cost, so reduction drive is currently a widely used solution in the electric wheel drive structure of new energy vehicles. However, the existing reducer will shake during the gear transmission process, and the fixing effect of the gear inside the device is poor, which can easily cause the gear inside the device to shift, causing the internal parts to collide and damage each other, and there are safety hazards during the use of the device, and the use of the device has limitations.

[0004] Therefore, a new solution needs to be proposed to solve this problem. Utility Model Content

[0005] In view of the shortcomings of the prior art, the purpose of the utility model is to provide a planetary gear reducer. By arranging a first gear ring and a second gear ring in the gear box housing, the first gear ring is meshed with three first gears, and the second gear ring is meshed with four second gears, so that the internal structure of the entire reducer is compact, the internal transmission backlash is reduced, the gears are prevented from being offset, and the safety performance is increased and reduced.

[0006] The above technical purpose of the utility model is achieved through the following technical solutions: a planetary gear reducer, including a gear box housing, a rotating transmission sleeve is arranged on one side of the gear box housing, a first sun gear is arranged at the center of the transmission sleeve, a rotating transmission plate is arranged in the gear box housing, a ring array of first gears are arranged on the transmission plate, and the second sun gear is arranged on the side of the transmission plate away from the first gear, an output plate is also arranged on one side of the gear box housing, a ring array of second gears are arranged on the output plate, and the first gear ring and the second gear ring are arranged on the inner wall of the gear box housing, which are respectively meshed with the first gears and the second gears.

[0007] Preferably, the diameter of the first gear ring is smaller than that of the second gear ring, the diameter of the first gear is smaller than that of the second gear ring, and the rotation rate of the first gear ring is greater than that of the second gear ring.

[0008] Preferably, a cover is clamped on one side of the tooth box shell, the cover annular array has a plurality of L-shaped elastic clamping parts, the tooth box shell peripheral wall annular array has clamping grooves corresponding to the elastic clamping parts one by one, and the output disk is rotatably arranged on the cover.

[0009] Preferably, a through hole is opened in the center of the output disk, a transmission tooth is arranged in the through hole, and the transmission tooth is meshed with an output pinion.

[0010] Preferably, a pulley is provided on the transmission sleeve.

[0011] The utility model has the following beneficial effects:

[0012] 1. When the reducer is transmitting, it is connected to the transmission part of the car through the pulley on the transmission sleeve, and then the output pinion is connected to the driven part of the car. The transmission part rotates and drives the transmission sleeve to rotate through the pulley, and the first sun gear on the transmission sleeve rotates. The first sun gear rotates and drives three first gears to rotate. The three first gears drive the gear box housing to rotate through the first gear ring meshing with them. At the same time, a number of first gears drive the second sun gear to rotate through the transmission plate. The second sun gear is transmitted through four second gears meshing with it. The gear box housing is meshed with four second gears through the second gear ring. The four second gears are all rotatably arranged and are respectively arranged in a ring array on the output plate. Since the diameter of the first gear ring is smaller than the diameter of the second gear ring, the rotation rate of the four second gears is smaller than the rotation rate of the three first gears, so that the rotation speed of the output plate is reduced after being transmitted by the first gear and the second gear.

[0013] 2. The four second gears and the three first gears in the gear box housing are linked by a transmission plate, and the four second gears and the three first gears are compactly installed through the first sun gear and the second sun gear and the first gear ring and the second gear ring arranged in the gear box housing, thereby reducing the backlash of the reducer. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of the utility model;

[0015] Figure 2 It is a cross-sectional view of the utility model;

[0016] Figure 3 It is an exploded view of the utility model;

[0017] Figure 4 It is a schematic structural diagram of the first gear and the second gear of the utility model.

[0018] In the figure: 1. gear box housing; 2. transmission sleeve; 3. first sun gear; 4. transmission plate; 5. first gear; 6. second sun gear; 7. output plate; 8. second gear; 9. first gear ring; 10. second gear ring; 11. cover; 12. elastic clamping piece; 13. clamping groove; 14. transmission tooth; 15. output pinion; 16. pulley. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0020] A planetary gear reducer, such as Figures 1 to 4 As shown, it includes a gear box housing 1, a transmission sleeve 2, a transmission disc 4, an output disc 7, a first gear 5 and a second gear 8.

[0021] refer to Figures 1 to 4 As shown: the inner wall of the gear box housing 1 is integrally formed with a first gear ring 9 and a second gear ring 10, the first gear ring 9 and the second gear ring 10 have different diameters, a through slot is opened on one side of the gear box, the transmission sleeve 2 is integrally formed with a first sun gear 3 inserted in the through slot, and the transmission disk 4 has three limiting columns in an annular array, the first gear 5 is provided with three and is rotatably mounted on the three limiting columns, the three first gears 5 are respectively arranged in an annular manner around the first sun gear 3, the three first gears 5 are all meshed with the first sun gear 3, and the three first gears 5 are all meshed with the first sun gear 3. A gear ring 9 is meshed, and a second sun gear 6 is integrally formed on the side of the transmission disc 4 away from the first gear 5. The output disc 7 rotates on a ring array with four limit columns, and four second gears 8 are provided and are rotatably set on the four limit columns. The four second gears 8 are all meshed with the second sun gear 6, and the four second gears 8 are all meshed with the second gear ring 10. A through hole is opened in the center of the output disc 7, and a transmission tooth 14 is integrally formed on the inner wall of the through hole. The transmission tooth 14 is meshed with an output pinion 15, and a pulley 16 is provided on the transmission sleeve 2.

[0022] When the reducer is in use, a first gear ring 9 and a second gear ring 10 with different diameters are arranged on the inner wall of a gear box housing 1, a plurality of first gears 5 are arranged in a ring array around the first sun gear 3, and at the same time the first gear ring 9 is set up around the plurality of first gears 5, and the plurality of first gears 5 are meshed with the first sun gear 3 and the first gear 5, a plurality of second gears 8 are arranged in a ring array around the second sun gear 6, and at the same time the second gear ring 10 is set up around the plurality of second gears 8, and the plurality of second gears 8 are meshed with the second sun gear 6 and the second gear 8, thereby making the reducer structure compact and preventing the internal gears from being offset.

[0023] refer to Figures 1 to 4As shown: a cover 11 is clamped on one side of the tooth box housing 1, and the cover 11 has a plurality of L-shaped elastic clamping parts 12 in a circular array. The peripheral wall of the tooth box housing 1 has a circular array of clamping grooves 13 corresponding to the elastic clamping parts 12 one by one, and the output disk 7 is rotatably set on the cover 11.

[0024] The reducer has its parts installed by means of a cover 11 and a gear box housing 1. When maintenance is required, the cover 11 and the gear box housing 1 are separated by squeezing the L-shaped elastic clip 12 to open the reducer as a whole, and then the reducer can be maintained.

[0025] In summary:

[0026] When the reducer is transmitting, the pulley 16 on the transmission sleeve 2 is connected to the transmission part of the car, and then the output pinion 15 is connected to the driven part of the car. The transmission part rotates through the pulley 16 to drive the transmission sleeve 2 to rotate, and the first sun gear on the transmission sleeve 2 rotates. The first sun gear rotates to drive the three first gears 5 to rotate. The three first gears 5 drive the gear box housing 1 to rotate through the first gear ring 9 meshing with them. At the same time, several first gears 5 drive the second sun gear 6 to rotate through the transmission plate 4. The second sun gear 6 is transmitted through the four second gears 8 meshing with it. The gear box housing 1 is meshed with the four second gears 8 through the second gear ring 10. The four second gears 8 mesh with each other. The gears 8 are all rotatably arranged and are respectively arranged in a ring array on the output disk 7. Since the diameter of the first gear ring 9 is smaller than the diameter of the second gear ring 10, the rotation rate of the four second gears 8 is smaller than the rotation rate of the three first gears 5, so that the rotation speed of the output disk 7 is reduced after being transmitted by the first gear 5 and the second gear 8. At the same time, the four second gears 8 and the three first gears 5 in the gear box housing 1 are linked through a transmission disk 4; the four second gears 8 and the three first gears 5 are compactly installed through the first sun gear 3 and the second sun gear 6 and the first gear ring 9 and the second gear ring 10 arranged in the gear box housing 1, thereby reducing the backlash of the reducer.

[0027] The above is only a preferred embodiment of the present invention. The protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A planetary gear reducer, comprising a gear housing (1), characterized in that: A rotating transmission sleeve (2) is arranged on one side of the gear box housing (1), a first sun gear (3) is arranged at the center of the transmission sleeve (2), a rotating transmission disc (4) is arranged inside the gear box housing (1), a plurality of first gears (5) are arranged in an annular array on the transmission disc (4) and are all meshed with the first sun gear (3), a second sun gear (6) is arranged on a side of the transmission disc (4) away from the first gear (5), an output disc (7) is also arranged on one side of the gear box housing (1), a plurality of second gears (8) are arranged in an annular array on the output disc (7) and are all meshed with the second sun gear (6), and a first gear ring (9) and a second gear ring (10) are arranged on the inner wall of the gear box housing (1) and are respectively meshed with the plurality of first gears (5) and the plurality of second gears (8).

2. The planetary gear reducer according to claim 1, characterized in that: The diameter of the first gear ring (9) is smaller than the diameter of the second gear ring (10), the diameter of the first gear (5) is smaller than the diameter of the second gear ring (10), and the rotation speed of the first gear ring (9) is greater than the rotation speed of the second gear ring (10).

3. The planetary gear reducer according to claim 2, characterized in that: A cover (11) is clamped on one side of the tooth box housing (1); the cover (11) has a plurality of L-shaped elastic clamping parts (12) in an annular array; a peripheral wall of the tooth box housing (1) has a clamping groove (13) in an annular array corresponding to the elastic clamping parts (12); and the output disk (7) is rotatably arranged on the cover (11).

4. The planetary gear reducer according to claim 3, characterized in that: A through hole is provided at the center of the output disk (7), a transmission tooth (14) is arranged in the through hole, and the transmission tooth (14) is meshed with an output pinion (15).

5. The planetary gear reducer according to claim 4, characterized in that: A pulley (16) is provided on the transmission sleeve (2).

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